PES to DST Converter

Commercial Machine Embroidery with Tajima DST

In high-volume commercial garment decoration, Tajima DST is the undisputed industry benchmark. From massive 12-head factory production lines to single-head commercial machines from manufacturers including Tajima, Barudan, Happy, SWF, ZSK, and Ricoma, the DST format ensures universal machine readability.

However, many independent digitizers, crafters, and graphic designers create their designs in Brother PES format because of its widespread adoption in consumer and semi-commercial machines. When sending these designs to a contract decorator or scaling up production from a home studio to an industrial workshop, converting Brother PES to Tajima DST is an essential step.

Technical Mechanics: Converting PES to DST

Translating a Brother PES file into a commercial Tajima DST file requires decoding Brother's proprietary binary container and reconstructing an authentic Tajima coordinate sequence:

1. Container Extraction & PEC Discovery: The parser reads the PES signature (#PES0001) and locates the 4-byte offset pointer at byte 8 pointing to the embedded #PEC0001 block.
2. Decoding PEC Variable-Length Coordinates: The PEC stitch stream uses a hybrid 7-bit/12-bit encoding. The converter iterates through each coordinate delta, reconstructing absolute positions (X, Y) and identifying stitch types: regular needle penetrations, jump stitches, and color change markers (0xFE 0xB0).
3. Quantization to Tajima Ternary Moves: Tajima machines accept coordinate steps encoded as signed powers of 3 (±1, ±3, ±9, ±27, ±81). The maximum displacement in a single Tajima stitch record is 121 decimillimeters (12.1 mm). Any movement exceeding 121 units (such as long jumps across hoops) is automatically decomposed into a sequence of consecutive jump records, ensuring the needle carriage travels smoothly without mechanical error.
4. Three-Byte Bit Packing: Each ternary delta is mapped into Tajima's 3-byte command record:
   • Byte 1: Encodes 1-unit and 9-unit X/Y flags.
   • Byte 2: Encodes 3-unit and 27-unit X/Y flags.
   • Byte 3: Encodes 81-unit X/Y flags, along with Jump (bit 7) and Color Change (bit 6) flags.
5. 512-Byte Header Generation: Industrial embroidery machine controllers expect a fixed 512-byte ASCII header beginning with LA: and recording exact statistical bounds (ST:, CO:, +X:, -X:, +Y:, -Y:). The header concludes with a 0x1A byte and space padding up to byte 512.
6. End of File Termination: The stitch stream concludes with Tajima's standardized 3-byte end-of-design sequence (0x00 0x00 0xF3), signaling the machine controller that the pattern is complete.

Managing Color Sequences in Commercial Multi-Head Production

Because the DST format does not store thread color codes, transitioning from PES to DST involves a shift in production management:

• Understand Color Stops: When your Brother machine stitches a PES file, it prompts you for specific thread colors (e.g., "Prussian Blue", "Deep Gold"). When the same design is converted to DST and loaded onto a commercial machine, the machine stops at each color change and shifts to the next programmed needle bar.
• Documenting the Thread Run Sheet: Our tool displays the exact sequence of thread colors extracted from the Brother PES file. Print or record this color sequence so the machine operator can map each needle bar (e.g., Needle 1 = Navy, Needle 2 = Gold, Needle 3 = White) to match the original design intent.
• Trimming & Tie-Offs: Commercial machines handle jump stitches differently than home machines. Most modern commercial equipment automatically cuts threads on jumps exceeding 2 mm. The clean ternary jump records generated by our converter ensure your commercial trimmer engages cleanly without leaving loose tails.

Quality Verification Before Running Production

• Check Center Origin: Commercial machines typically load designs centered at (0, 0). Our converter centers the design bounds relative to the starting point, preventing frame limit collisions on tubular hoop setups.
• Review Total Stitch Count: Commercial embroidery pricing is frequently calculated per thousand stitches (e.g., $1.00 - $1.50 per 1,000 stitches). Use our precise stitch counter to accurately quote customer jobs.
• Simulate Before Stitching: Use the built-in playback scrubber to inspect stitch order, ensuring underlay stitches sew first before satin and fill passes.